3BQD

Doubling the Size of the Glucocorticoid Receptor Ligand Binding Pocket by Deacylcortivazol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Doubling the size of the glucocorticoid receptor ligand binding pocket by deacylcortivazol.

Suino-Powell, K.Xu, Y.Zhang, C.Tao, Y.G.Tolbert, W.D.Simons, S.S.Xu, H.E.

(2008) Mol.Cell.Biol. 28: 1915-1923

  • DOI: 10.1128/MCB.01541-07

  • PubMed Abstract: 
  • A common feature of nuclear receptor ligand binding domains (LBD) is a helical sandwich fold that nests a ligand binding pocket within the bottom half of the domain. Here we report that the ligand pocket of glucocorticoid receptor (GR) can be continu ...

    A common feature of nuclear receptor ligand binding domains (LBD) is a helical sandwich fold that nests a ligand binding pocket within the bottom half of the domain. Here we report that the ligand pocket of glucocorticoid receptor (GR) can be continuously extended into the top half of the LBD by binding to deacylcortivazol (DAC), an extremely potent glucocorticoid. It has been puzzling for decades why DAC, which contains a phenylpyrazole replacement at the conserved 3-ketone of steroid hormones that are normally required for activation of their cognate receptors, is a potent GR activator. The crystal structure of the GR LBD bound to DAC and the fourth LXXLL motif of steroid receptor coactivator 1 reveals that the GR ligand binding pocket is expanded to a size of 1,070 A(3), effectively doubling the size of the GR dexamethasone-binding pocket of 540 A(3) and yet leaving the structure of the coactivator binding site intact. DAC occupies only approximately 50% of the space of the pocket but makes intricate interactions with the receptor around the phenylpyrazole group that accounts for the high-affinity binding of DAC. The dramatic expansion of the DAC-binding pocket thus highlights the conformational adaptability of GR to ligand binding. The new structure also allows docking of various nonsteroidal ligands that cannot be fitted into the previous structures, thus providing a new rational template for drug discovery of steroidal and nonsteroidal glucocorticoids that can be specifically designed to reach the unoccupied space of the expanded pocket.


    Organizational Affiliation

    Laboratory of Structural Sciences, Van Andel Research Institute, 333 Bostwick Avenue, Grand Rapids, MI 49503, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glucocorticoid receptor
A
255Homo sapiensMutation(s): 1 
Gene Names: NR3C1 (GRL)
Find proteins for P04150 (Homo sapiens)
Go to Gene View: NR3C1
Go to UniProtKB:  P04150
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Nuclear receptor coactivator 1
B
13Homo sapiensMutation(s): 0 
Gene Names: NCOA1 (BHLHE74, SRC1)
EC: 2.3.1.48
Find proteins for Q15788 (Homo sapiens)
Go to Gene View: NCOA1
Go to UniProtKB:  Q15788
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DAY
Query on DAY

Download SDF File 
Download CCD File 
A
1-[(1R,2R,3aS,3bS,10aR,10bS,11S,12aS)-1,11-dihydroxy-2,5,10a,12a-tetramethyl-7-phenyl-1,2,3,3a,3b,7,10,10a,10b,11,12,12a-dodecahydrocyclopenta[5,6]naphtho[1,2-f]indazol-1-yl]-2-hydroxyethanone
Deacylcortivazol; 11beta,17,21-Trihydroxy-6,16alpha-dimethyl-2'-phenyl-2'H-pregna-2,4,6-trieno(3,2-c)pyrazol-20-one; 2'H-Pregna-2,4,6-trieno(3,2-c)pyrazol-20-one, 11,17,21-trihydroxy-6,16-dimethyl-2'-phenyl-(11beta,16alpha)-(9CI); 6,16A-DIMETHYLPREGNA-4,6-DIENE-11B,17A,21-TRIOL-20-ONE-2'-PHENYL-(3,2-C)- PYRAZO
C30 H36 N2 O4
FKAINCOIINXAOK-UFVJYOHBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.231 
  • Space Group: P 62
Unit Cell:
Length (Å)Angle (°)
a = 93.800α = 90.00
b = 93.800β = 90.00
c = 130.000γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
AMoREphasing
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2007-12-20 
  • Released Date: 2008-01-15 
  • Deposition Author(s): Xu, H.E.

Revision History 

  • Version 1.0: 2008-01-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance